diff --git a/lib/fort.c b/lib/fort.c
index 3ab2d29..8573126 100644
--- a/lib/fort.c
+++ b/lib/fort.c
@@ -171,7 +171,9 @@ size_t number_of_columns_in_format_wstring(const wchar_t *fmt);
 /*int snprint_n_chars(char *buf, size_t length, size_t n, char ch);*/
 /*int wsnprint_n_chars(wchar_t *buf, size_t length, size_t n, wchar_t ch);*/
 int snprint_n_strings(char *buf, size_t length, size_t n, const char *str);
+#if defined(FT_HAVE_WCHAR)
 int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str);
+#endif
 
 
 #define CHCK_RSLT_ADD_TO_WRITTEN(statement) \
@@ -4134,6 +4136,9 @@ int snprint_n_strings(char *buf, size_t length, size_t n, const char *str)
 //    return (int)n;
 //}
 
+#if defined(FT_HAVE_WCHAR)
+#define WCS_SIZE 64
+
 int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
 {
     size_t str_len = strlen(str);
@@ -4147,12 +4152,12 @@ int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
             if (*p <= 127)
                 p++;
             else {
-                const int SIZE = 64;
-                wchar_t wcs[SIZE];
+                wchar_t wcs[WCS_SIZE];
                 const char *ptr = str;
                 int length;
-                length = mbsrtowcs(wcs, (const char **)&ptr, SIZE, NULL);
+                length = mbsrtowcs(wcs, (const char **)&ptr, WCS_SIZE, NULL);
                 wcs[length] = L'\0';
+                /* for simplicity */
                 if (length > 1) {
                     return -1;
                 } else {
@@ -4194,7 +4199,7 @@ int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
     }
     return (int)(n * str_len);
 }
-
+#endif
 
 /********************************************************
    End of file "fort_utils.c"
diff --git a/src/fort_utils.c b/src/fort_utils.c
index 1534401..cd32717 100644
--- a/src/fort_utils.c
+++ b/src/fort_utils.c
@@ -236,6 +236,9 @@ int snprint_n_strings(char *buf, size_t length, size_t n, const char *str)
 //    return (int)n;
 //}
 
+#if defined(FT_HAVE_WCHAR)
+#define WCS_SIZE 64
+
 int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
 {
     size_t str_len = strlen(str);
@@ -249,12 +252,12 @@ int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
             if (*p <= 127)
                 p++;
             else {
-                const int SIZE = 64;
-                wchar_t wcs[SIZE];
+                wchar_t wcs[WCS_SIZE];
                 const char *ptr = str;
                 int length;
-                length = mbsrtowcs(wcs, (const char **)&ptr, SIZE, NULL);
+                length = mbsrtowcs(wcs, (const char **)&ptr, WCS_SIZE, NULL);
                 wcs[length] = L'\0';
+                /* for simplicity */
                 if (length > 1) {
                     return -1;
                 } else {
@@ -296,4 +299,4 @@ int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str)
     }
     return (int)(n * str_len);
 }
-
+#endif
diff --git a/src/fort_utils.h b/src/fort_utils.h
index e4eb278..beb6224 100644
--- a/src/fort_utils.h
+++ b/src/fort_utils.h
@@ -134,7 +134,9 @@ size_t number_of_columns_in_format_wstring(const wchar_t *fmt);
 /*int snprint_n_chars(char *buf, size_t length, size_t n, char ch);*/
 /*int wsnprint_n_chars(wchar_t *buf, size_t length, size_t n, wchar_t ch);*/
 int snprint_n_strings(char *buf, size_t length, size_t n, const char *str);
+#if defined(FT_HAVE_WCHAR)
 int wsnprint_n_string(wchar_t *buf, size_t length, size_t n, const char *str);
+#endif
 
 
 #define CHCK_RSLT_ADD_TO_WRITTEN(statement) \